I have not seen a definitive measurement of the range.
That said, I have known (and know) a lot of people who could do this fairly easily.
An ordinary Glock is plenty accurate enough (2.5 inches at 25 yards, 4 inches at 40 yards). He supposedly was shooting supported from a pillar.
In my prime, I could hit a 16 inch gong at 100 yards, one handed, 9 out of 10 times, but a little slower, with my Colt Woodsman.
I am not sure of the percentages. It is much better than most police can do.
But for someone who consistently trains, it is very doable.
It is well below what is necessary for university level competition on the National Match course.
Yes, bullseye competition I can do quite well with 22LR, with 9, either a Sig P320 Legion X5 or an HK VP9 or VP40, I can do 6-8 inches two-handed from 25 yards, but doubt I’d keep that with all of the adrenalin and such of the moment. Braced on a column would help but still, it is very impressive, especially for a 22 year hold with unknown practice history.